A/C low cooling possible fan clutch

Discussion in 'General Tacoma Discussion' started by JimShep, Aug 6, 2020.

  1. JimShep

    JimShep Well-Known Member

    Any one have any thoughts on a bad fan clutch on the 4.0 l engines I know about the testing I worked on the earlier Toyotas for many moons
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  3. OR17TRD

    OR17TRD Well-Known Member

    Did you check the system level? Most of the time when ac doesn’t cool it’s due to a leak and low refrigerant in the system.
  4. OP

    JimShep Well-Known Member

    Yes i have done all of that . Thank you though for your advice the ac system , cooling system are all function great "except "when it is just when its 98°+ sitting at a light or the drive threw. I am sure it is the clutch all i need to do is keep the ram up around 1k just to get the damn fan spinning fast enough just more of a how many have seen this ? It just doesn't seem to lock up enough to pull the air throughout doesn't overheat. Just poor ac performance
  5. OP

    JimShep Well-Known Member

    I meant RPM not ram
  6. JDC

    JDC Well-Known Member

    Any movement in the fan blade shift suggests fan clutch replacement. With the engine off hold a fan blade move it up and down. If you feel movement or slack. I would replace the clutch. Also a bad fan clutch will cool at highway speeds and overheat at stop lights and slow speeds.

    Sent from my SM-G970U1 using Tapatalk
  7. Tape

    Tape Well-Known Member

    If you check the system what's the pressure on the low side? In my experience I haven't seen many clutch fans go bad.

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